home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: misc.consumers.house
- Path: sparky!uunet!panther!mothost!white!rtsg.mot.com!amigo12!wood
- From: wood@rtsg.mot.com (Dan Wood)
- Subject: Sensing that remote pump motor is running
- Message-ID: <wood.728059544@amigo12>
- Sender: news@rtsg.mot.com
- Nntp-Posting-Host: amigo12
- Organization: Motorola Inc., Cellular Infrastructure Group
- Distribution: na
- Date: Tue, 26 Jan 1993 14:45:44 GMT
- Lines: 25
-
- My parents have a lifting station installed in their septic tank to raise
- effulents to the level of the city sewers. They have had some large
- fluctuations in their electric bill lately, and suspect that the pump
- may be the culprit.
-
- They would like a means to alert them that the pump is running. The
- circuit supplying the pump is accessible from the main distribution panel
- in their home. The pump is 110V, about 1/2 or 3/4 hp. Basically I'm
- looking for a simple way to turn on a light (flashlight buld or bigger)
- when there is current flowing in the pump circuit. Obviously something
- that will not damage the pump, nor disable it if the detector fails.
-
- The local rep. from the power company suggest wiring a standard light
- bulb in series. My Dad wasn't sure it even worked, and I told him to
- disconnect it, because I felt that the voltage drop might damage the
- pump. I've thought of a mini-transformer, a couple of power diodes pointing
- in opposite directions (dropping about 1/2 V AC), a power transistor, etc.
-
- Any other ideas? I'm an EE, but my parents live about 250 miles away,
- so I'd like to keep the solution simple. TIA.
- --
- *********************************************************************************
- * Dan Wood Motorola Inc. * Moto and I disclaim *
- * wood@rtsg.mot.com * everything in this post. *
- *********************************************************************************
-